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Known bugs / things to fix #1

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camthesaxman opened this issue Mar 24, 2022 · 1 comment
Open

Known bugs / things to fix #1

camthesaxman opened this issue Mar 24, 2022 · 1 comment

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@camthesaxman
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camthesaxman commented Mar 24, 2022

1. 256 color palette is completely wrong. Figure out how palettes are supposed to be managed. fixed
2. The debug version of Win 95 traps an int 3 at KERNEL!(1) 011F:203A when opening the display properties or the start menu.
3. DOS prompts corrupt the screen when opened in windowed mode. This can be fixed by pressing Alt+Enter twice to go full screen and back. I may need to use a VxD to trap int 10h from v-86 mode.
4. 1-bit (monochrome) and 16 color modes are currently not supported. These may use a different memory layout.
5. Driver crashes at high resolutions and color depths. Not enough video memory? doesn't seem to happen anymore
6. Performance is unreasonably slow. Consider using the linear framebuffer mode if possible. done. linear framebuffer is way faster
7. Switching resolutions while in 256 color mode garbles the palette. fixed
8. Using the linear framebuffer mode causes an invalid instruction BSOD when opening a DOS prompt.

@hgkamath
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hgkamath commented Apr 10, 2024

Hope you get to complete what you started.
Much thanks to the developer(s).

20240411
I found your project from reading a 20230202 reddit post virtual graphics river for win98 on qemu.
I tried your qxl driver in win98 on qemu-9.0. I created a MSDOS prompt desktop-shortcut that directly opens to full-screen mode, but it also causes an illegal instruction crash. As such, there is no way to get to the command prompt, apart from exiting windows.
Otherwise, the GUI desktop seems fine, was able to set to 32bit true color. Of many available resolutions, I was content with 1024x768.
I also don't see a LICENSE file uploaded, the absence of which may cause to lose many potential users and contributors who pass by. Personally I hope to see a liberal open source license like MIT, BSD or Apache, which is most likely your intent as I understood from the readme. A liberal license would in theory allow someone to fork the repo and try alternative attempts to further it. But honestly, the ability to develop drivers for win9x is perhaps a skill of a few.

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